[PATCH 1/2] mach-snapdragon: of_fixup: Add OP-TEE DT fixup support

Sumit Garg
2025-12-29T11:43:41Z

From: Sumit Garg <sumit.garg@oss.qualcomm.com>

Add support for OP-TEE live tree DT fixup support which enables U-Boot
OP-TEE driver to be probed. As well as the EFI DT fixup protocol allows
the live tree fixup to be carried over to the OS for the OP-TEE driver
in the OS to probe as well.

Note that this fixup only gets applied if CONFIG_OPTEE gets enabled.

Signed-off-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
---
arch/arm/mach-snapdragon/of_fixup.c | 34 +++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/arch/arm/mach-snapdragon/of_fixup.c b/arch/arm/mach-snapdragon/of_fixup.c
index eec2c0c757e..29a99f73cf3 100644
--- a/arch/arm/mach-snapdragon/of_fixup.c
+++ b/arch/arm/mach-snapdragon/of_fixup.c
@@ -146,6 +146,37 @@ static void fixup_power_domains(struct device_node *root)
}
}

+static void add_optee_node(struct device_node *root)
+{
+ struct device_node *fw = NULL, *optee = NULL;
+ int ret;
+
+ fw = of_find_node_by_path("/firmware");
+ if (!fw) {
+ log_err("Failed to find /firmware node\n");
+ return;
+ }
+
+ ret = of_add_subnode(fw, "optee", strlen("optee") + 1, &optee);
+ if (ret) {
+ log_err("Failed to add 'maximum-speed' property: %d\n", ret);
+ return;
+ }
+
+ ret = of_write_prop(optee, "compatible", strlen("linaro,optee-tz") + 1,
+ "linaro,optee-tz");
+ if (ret) {
+ log_err("Failed to optee 'compatible' property: %d\n", ret);
+ return;
+ }
+
+ ret = of_write_prop(optee, "method", strlen("smc") + 1, "smc");
+ if (ret) {
+ log_err("Failed to optee 'method' property: %d\n", ret);
+ return;
+ }
+}
+
#define time_call(func, ...) \
do { \
u64 start = timer_get_us(); \
@@ -160,6 +191,9 @@ static int qcom_of_fixup_nodes(void * __maybe_unused ctx, struct event *event)
time_call(fixup_usb_nodes, root);
time_call(fixup_power_domains, root);

+ if (IS_ENABLED(CONFIG_OPTEE))
+ time_call(add_optee_node, root);
+
return 0;
}

--
2.51.0